1.2.U4: Electron microscopes have a much higher resolution than light microscopes (Oxford Biology Course Companion page - Define resolution. - Compare the maximum resolutions of a light microscope with those of an electron microscope. - List three example structures that are visible with electron microscopes but not with a light microscope.
1.2.NOS1: Developments in scientific research follows improvements in apparatus- the invention of the electron microscopes led to greater understanding of cell structure (Oxford Biology Course Companion page 17) - With reference to a specific example, explain how an improvement in apparatus allowed for greater understanding of cell structure.
1.1.S1: Use of a light microscope to investigate the structure of cells and tissues (Oxford Biology Course Companion page 3).(Practical 1) - Label the names of parts of the microscope. - Given the magnification of the ocular and objective lenses, calculate the total microscope magnification. - Measure the field of view diameter of a microscope under low power. - Calculate the field of view diameter of a microscope under medium or high power. - Estimate the size of a sample in the microscope field of view. - Demonstrate how to focus the microscope on a sample. - Demonstrate how to make a temporary “wet mount” on a microscope slide.
1.1.S2: Drawing cell structures as seen with the light microscope (Oxford Biology Course Companion page 5).- Demonstrate how to draw cell structures seen with a microscope using sharp, carefully joined lines and straight edge lines for labels.
1.1.S3: Calculation of the magnification of drawings and the actual size of structures and ultrastructures shown in drawings or micrographs (Oxford Biology Course Companion page 6).- Define micrograph. - State why the magnification of a drawing or micrograph is not the same as the magnification of the microscope. - Use a formula to calculate the magnification of a micrograph or drawing. - If given the magnification of a micrograph or drawing, use a formula to calculate the actual size of a specimen.
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